Regardless of occupancy or function, the preferred location of a building should be on a site that is not liable to flooding.
Issues of flooding and the location of development have become a significant issue in recent years, particularly following major UK flooding events in the late 1990's.
The Environment Agency are now consulted on a Statutory basis over applications where flooding may be an issue.
This is not just in coastal locations, but also low lying land in the vicinity of streams and rivers, and land where ground water levels are close to the surface and flooding occurs after heavy rain.
In circumstances where the Environment Agency consider there is a risk of flooding they may require a Flood Risk Assessment to accompany any planning application.
Useful links for guidance are;